- Engineering work is taking place between Barnham and Bognor Regis, closing all lines. Replacement buses will run between Barnham and Bognor Regis. Services between Littlehampton and Bognor Regis will instead run between Littlehampton and Chichester.

- Engineering work is taking place between Three Bridges and Brighton/Lewes closing the line. Replacement buses will run between Three Bridges and Brighton/Lewes.

- No Gatwick Express trains between Gatwick Airport and Brighton today. Gatwick Express trains will only run between London Victoria and Gatwick Airport. These trains will not run between Gatwick Airport and Brighton.